diff --git a/src/lib/openjp2/cidx_manager.c b/src/lib/openjp2/cidx_manager.c
index b0e6d9c3..8324717f 100644
--- a/src/lib/openjp2/cidx_manager.c
+++ b/src/lib/openjp2/cidx_manager.c
@@ -79,25 +79,25 @@ int opj_write_cidx( int offset, opj_stream_private_t *cio, opj_codestream_info_t
     opj_write_manf( i, num_box, box, cio,p_manager);
     
     num_box = 0;
-    box[num_box].length = opj_write_mainmhix( offset, cstr_info, cio,p_manager);
+    box[num_box].length = (OPJ_UINT32)opj_write_mainmhix( offset, cstr_info, cio,p_manager);
     box[num_box].type = JPIP_MHIX;
     num_box++;
 
-    box[num_box].length = opj_write_tpix( offset, cstr_info, j2klen, cio,p_manager);
+    box[num_box].length = (OPJ_UINT32)opj_write_tpix( offset, cstr_info, j2klen, cio,p_manager);
     box[num_box].type = JPIP_TPIX;
     num_box++;
       
-    box[num_box].length = opj_write_thix( offset, cstr_info, cio, p_manager);
+    box[num_box].length = (OPJ_UINT32)opj_write_thix( offset, cstr_info, cio, p_manager);
     box[num_box].type = JPIP_THIX;
     num_box++;
 
     EPHused = opj_check_EPHuse( offset, cstr_info.marker, cstr_info.marknum, cio,p_manager);
       
-    box[num_box].length = opj_write_ppix( offset, cstr_info, EPHused, j2klen, cio,p_manager);
+    box[num_box].length = (OPJ_UINT32)opj_write_ppix( offset, cstr_info, EPHused, j2klen, cio,p_manager);
     box[num_box].type = JPIP_PPIX;
     num_box++;
     
-    box[num_box].length = opj_write_phix( offset, cstr_info, EPHused, j2klen, cio,p_manager);
+    box[num_box].length = (OPJ_UINT32)opj_write_phix( offset, cstr_info, EPHused, j2klen, cio,p_manager);
     box[num_box].type = JPIP_PHIX;
     num_box++;
       
@@ -110,7 +110,7 @@ int opj_write_cidx( int offset, opj_stream_private_t *cio, opj_codestream_info_t
 
   opj_free( box);
   
-  return len;
+  return (int)len;
 }
 
 
@@ -128,8 +128,8 @@ void opj_write_cptr(int coff, int clen, opj_stream_private_t *cio,
   opj_write_bytes( l_data_header, JPIP_CPTR, 4);   /* T                  */
   opj_write_bytes( l_data_header+4, 0, 2);           /* DR  A PRECISER !!  */
   opj_write_bytes( l_data_header+6, 0, 2);           /* CONT               */
-  opj_write_bytes( l_data_header+8, coff, 8);    /* COFF A PRECISER !! */
-  opj_write_bytes( l_data_header+16, clen, 8);    /* CLEN               */
+  opj_write_bytes( l_data_header+8, (OPJ_UINT32)coff, 8);    /* COFF A PRECISER !! */
+  opj_write_bytes( l_data_header+16, (OPJ_UINT32)clen, 8);    /* CLEN               */
   opj_stream_write_data(cio,l_data_header,3*8,p_manager);
 
   len = (OPJ_UINT32) (opj_stream_tell(cio) - lenp);
@@ -179,7 +179,7 @@ int opj_write_mainmhix( int coff, opj_codestream_info_t cstr_info, opj_stream_pr
               opj_event_mgr_t * p_manager )
 {
   OPJ_BYTE l_data_header [8];
-  int i;
+  OPJ_UINT32 i;
   OPJ_UINT32 len;
   OPJ_OFF_T lenp;
   
@@ -188,16 +188,16 @@ int opj_write_mainmhix( int coff, opj_codestream_info_t cstr_info, opj_stream_pr
   opj_write_bytes(l_data_header,JPIP_MHIX,4);       /* MHIX                              */
   opj_stream_write_data(cio,l_data_header,4,p_manager);
 
-  opj_write_bytes(l_data_header, cstr_info.main_head_end-cstr_info.main_head_start+1, 8);        /* TLEN                              */
+  opj_write_bytes(l_data_header, (OPJ_UINT32)(cstr_info.main_head_end-cstr_info.main_head_start+1), 8);        /* TLEN                              */
   opj_stream_write_data(cio,l_data_header,8,p_manager);
 
-  for(i = 1; i < cstr_info.marknum; i++){    /* Marker restricted to 1 apparition, skip SOC marker */
+  for(i = 1; i < (OPJ_UINT32)cstr_info.marknum; i++){    /* Marker restricted to 1 apparition, skip SOC marker */
     opj_write_bytes( l_data_header, cstr_info.marker[i].type, 2);
     opj_write_bytes( l_data_header+2, 0, 2);
     opj_stream_write_data(cio,l_data_header,4,p_manager);
     opj_write_bytes( l_data_header,(OPJ_UINT32) (cstr_info.marker[i].pos-coff), 8);
     opj_stream_write_data(cio,l_data_header,8,p_manager);
-    opj_write_bytes( l_data_header, cstr_info.marker[i].len, 2);
+    opj_write_bytes( l_data_header, (OPJ_UINT32)cstr_info.marker[i].len, 2);
     opj_stream_write_data(cio,l_data_header,2,p_manager);
   }
 
@@ -207,7 +207,7 @@ int opj_write_mainmhix( int coff, opj_codestream_info_t cstr_info, opj_stream_pr
   opj_stream_write_data(cio,l_data_header,4,p_manager);
   opj_stream_seek(cio, lenp+len,p_manager);
   
-  return len;
+  return (int)len;
 }
 
 OPJ_BOOL opj_check_EPHuse( int coff, opj_marker_info_t *markers, int marknum, opj_stream_private_t *cio,